Ogbiyele, Paul, and Peter Arawomo. “On Asymptotic Behavior of Solution to a Nonlinear Wave Equation With Space-Time Speed of Propagation and Damping Terms”. Proyecciones (Antofagasta, On line) 40, no. 6 (November 29, 2021): 1615-1639. Accessed April 19, 2024. https://www.revistaproyecciones.cl/index.php/proyecciones/article/view/4415.